Night croud stumble help
07-22-2007, 06:04 PM
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Night croud stumble help
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Okay ya'll need some help and I've done tons of searching trying to track it down without posting. My problem is when I hit WOT the almost always stumbles. I get lots of misfire codes and the WOT runs tend to give a CEL for misfires. My 02's are new and give me sub .9v's all the time in 3rd gear at WOT. I tried pulling primary only to give me a lean code. I also did a few FATS and my best was like a 5.6 which is like STOCK fast....
Cyl 3 and 6 misfire quite a bit at idle but moving plugs and packs doesn't seem to help. I'm running the NGK BKR7E plugs gapped at .028 btw. Tried stock Bosch plugs aswell with same problem.
I've done boost leak tests with none found. Used the homemade tester along with the shop smoke tester.
My current mods are in my sig!
Log of last night sorry its so short<ul><li><a href="http://i140.photobucket.com/albums/r40/brizax/kendallogpic.jpg">http://i140.photobucket.com/albums/r40/brizax/kendallogpic.jpg</a</li></ul>
Okay ya'll need some help and I've done tons of searching trying to track it down without posting. My problem is when I hit WOT the almost always stumbles. I get lots of misfire codes and the WOT runs tend to give a CEL for misfires. My 02's are new and give me sub .9v's all the time in 3rd gear at WOT. I tried pulling primary only to give me a lean code. I also did a few FATS and my best was like a 5.6 which is like STOCK fast....
Cyl 3 and 6 misfire quite a bit at idle but moving plugs and packs doesn't seem to help. I'm running the NGK BKR7E plugs gapped at .028 btw. Tried stock Bosch plugs aswell with same problem.
I've done boost leak tests with none found. Used the homemade tester along with the shop smoke tester.
My current mods are in my sig!
Log of last night sorry its so short<ul><li><a href="http://i140.photobucket.com/albums/r40/brizax/kendallogpic.jpg">http://i140.photobucket.com/albums/r40/brizax/kendallogpic.jpg</a</li></ul>
07-23-2007, 04:23 AM
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You're looking at columns 3 and 5 which are post-cat readings (secondary O2s)
AFAIK, these are not used for closed-loop A/F feedback. It *is* weird that the bank 2 secondary O2 reads so much lower than the one on bank 1. Columns 2 and 4 indicate the car is running a little rich.
Question to the original poster: You said O2s are new, did you replace all 4? Zoldmans?
Question to the original poster: You said O2s are new, did you replace all 4? Zoldmans?
07-23-2007, 04:46 AM
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I'll unplug the MAF tonight and do a log and post it again for ya'll
FWIW all my older logs resemble this one with my O2's being in the .90-.92 range all the way to red line even with a new MAF I borrowed from my mechanic for a few weeks.
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07-23-2007, 06:14 PM
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Sorry no logs tonight! Had to go to a birthday dinner. Tomorrow night I promise LOL
I blame the GF but its all good. I did turn the boost down a lil bit today and beat on it pretty good with no problems. Thinking maybe turn it back up again and add a lil primary.... we'll see.